Machine fob tapping nuts



ALMON B. GLOVER, OF BIRMINGHAM, CONNECTICUT.

MACHINE FOR TAPPINGr NUTS.

Specification of Letters Patent No. 17,734, dated July 7, 1857.

T 0 all whom it may concern:

Be it known that I, ALMON B. GLovER, of Birmingham, in the county of NewHaven and State of Connecticut, have invented a new and Improved Machinefor Tapping Nuts; and I do hereby declare that the following is a full,clear, and exact description of the same, reference being had to theanneXed drawings, making a part of this specification, in which- Figurel is a vertical longitudinal section of my improvement; x, Fig. 3,indicating the plane of section. Fig. 2 is an end view of ditto. Fig. 3is a plan or top view of ditto. Fig. 4 is a detached plan or top view ofthe device by which the motion of the arbor is reversed. Fig. 5 is adetached view of the device employed for feeding the blanks into the tapbox.

Similar letters of reference indicate corresponding parts in the severalfigures.

This invention relates to a new and improved machine for tapping nuts,wherein the tap is fed to the blanks automatically and also dueprovision made for any irregularity in the operation of the tap, or thedevice which feeds the blanks to the same.

The invention consists in the peculiar means employed for e-Eecting thepurpose' above mentioned.

To enable those skilled in the art to make and use my invention, I willproceed to describe its construction and operation.

A represents a framing on the upper part of which a socket B is placed,said socket being fitted in a suitable bearing (a).

B1 represents a mandrel or arbor, the inner end of which is fitted inthe socket B, and is Iliade to turn therewith by means of a pin (b),which passes transversely through the mandrel or arbor and fits in aslot made in the end of the socket. On the arbor B1, a shoulder orcollar (c), is ermanently secured, and a sleeve (d) is p aced loosely onthe arbor B1, said sleeve having a spiral spring (c) placed within it.One end of this spring (c) bears against a pin (f), which passes throughthe arbor B, the ends of said pin fitting in slots (g) in the sleeve(d).

The outer end of the arbor B1 has a tap C secured in it. The socket Bhas a toothed wheel (i) on it, the wheel (i) being on the outer end ofthe socket B.

D represents a shaft which is placed transversely on one end of theupper part of the framing A. A driving pulley E is placed on one end ofthis shaft D, and two beveled wheels F, F, are laced loosely on theshaft D. On the sha t D there is also placed loosely a collar (j), thecenter portion of which has a groove (le) made in it circumferentially,said groove having a fork (l) fitted in it.

The ends of the collar (j) have pins (m) secured in them, two pins ateach side and two pins (n) are also secured in the inner side of eachwheel F. The collar (j) is secured on the shaft D by means of a featherand groove so that said collar is made to turn with the shaft and at thesame time allowed to slide on it.

G is a shaft which is placed in the framing A, below the arbor B, and inthe same plane. This shaft G, has a bow shaped bar H, placed loosely onit, and one end of the bar H, has a projection (i) attached to it; saidprojection eilig provided with a pin (p) which is fitted in a specialroove (g), in a collar (1"), on the shaft G. T e end (s) of the collar(r), adjoining the end of the bar H is made inclined or obli ue with itsaxis and the end (t), of the bar I, which adjoins it is of corres ondingform as shown clearly in Fig. 1. T e bar H has a vertical rod I attachedto it and the arbor B1 passes through the up er end of said rod the rodI being between tife shoulder or collar (c), and the sleeve (d).

The socket B, is connected by means of gearing (1), (2), (3), (4), witha shaft J, the outer end of which has a pinion (u), on it. This inion(u) gears into a toothed wheel K, whic is laced on the outer end of4 theshaft G. T ewheel K, has a segment slot (c), made through it near itsperiphery and a pin or projection (w), is fitted in said slot (c). Thispin or projection is rendered adjustable, that is, may be moved andsecured at any desired point within the slot (c). A pin or projection(w1) is permanently secured at one end of the slot (c).

The fork (Z) which is fitted in the groove (7c) is attached to the upperend of a bar L, the lower end of which 1s fitted and allowed to work orturn on a projecting rod (z), attached to the framing.

To each side of the bar L a spring (al) is attached and a horizontal barM is attached to the framing A, just below the shaft D, the bar beingparallel with said shaft. On this bar M, two arms or bars (b1), (b1) arepivoted as shown at (c1), (c1) Each arm or bar (b1) has a notch (d1),made in it, and the bar L,

` catches alternately into these notches as will attached to them, theopposite end of said spring being attached to the shaft N. The arms(g1), are constructed at their inner ends and are placed loosely on theshaft N, a pin (i), preventing the arms from yturning or moving on theshaft in one direction, and the spring (h1), preventing them fromturning in the other direction.

On the outer end ofthe shaft N, an arm (y1), is attached. The upper endof this arm is slotted and a pin (Z111), which is attached to a slide(Z1), fits in said slot. The slide (l1) works in a socket (m1), which isattached tranversely to the end of a feed board O, on the framing A.y

The inner edge of the feed board O, has a vertical ledge (11,1),attached to it, on'which a follower (o1), is fitted and allowed to slidefreely thereon. The follower is merely a rectangular bar fitted in anyproper manner on the ledge (n1), a string (p1) is attached to the underside of the follower, and this string passes over pulleys (g1), and hasa weight (r1) attached to it. To the end of the feed board O, and inline with the slide (Z1), a trough or boX (s1), is placed.

The operation is as follows: The blanks shown in red in Figs. 1, 3, and5, are placed on the feed board O, and the follower (01) is drawn backand allowed to bear against the end blank. Several rows of blanks may beplaced on the feed board O, a bar or plate (u1), dividing the rowadjoining the ledge (n1), from the others. Motion is given the drivenpulley E, in any proper manner and the -two wheels F, F, are connectedalternately with the shaft D, by means of the sliding collar (j), whichis operated by the bar L, the bar L being vibrated by the projection(w), (w1), in the slot (c), in the wheel K. This alternate connection ofthe wheels F, with the shaft D, gives a rotating reciprocating motion tothe arbor B1, and shaft G. Each time the arbor B1, is moved from left toright the arbor is moved forward in the direction indicated by the arrow11, by means of the oblique end (s), of the collar (r), which is in facta cam. The tap C, is fed to its work during this forward movement of thearbor B1, a blank being shoved into the tap box (81) by the slide (Z1),just previous to the forward movement of the arbor and the tap passesthrough a hole in the blank and cuts the thread. When the arbor B1,turns in the reverse direction, viz, from right to left, the arbor B1will be moved backward in the direction indicated by arrow 2, in conse?fkuence of the pin (p), on the projection (o), tting in the spiralgroove (g), and the tap is moved bacl. The slide (Z) is operated at theproper time back and forth by means of the tappet (f1) actingalternately against the arms (g1), (g1), and the blanks are fed in frontof the slide (Z1), by the follower (o1). Each time a blank is fed intothe boX (o1), aV finished nut is forced out. In case these should be anyirregularity in the feeding of the blanks within the tap boX (81), andthe forward movement of the arbor B1 should be opposedV thereby, thespring (e) within the sleeve (d) will yield or give so that the sleeve(d) will be moved instead of the arbor B1, therefore preventing thearbor or any of the parts connected therewith from being subjected toanyundue strain on account Alike provision is also y of the obstruction.made for the device by which -the blanks are fed into the tap box for incase the movement of the slide (Z1), is obstructed or opposed the spring(h1) will yield or give and allow the arms (g1) a requisite degree ofmovement independent of the shaft N.

From the above description of parts it will be seen that the arbor B1,has a rotating, reciprocating motion given it the tap C, fed to its workwhile turning from left to right, and moved back while turning in thereverse direction, and the blanks fed into the tap boX (s1), in front ofthe tap by the movement of the pulley E, the several parts beingoperated automatically.

Havin thus described my invention, what I c aim as new, and desire tosecure by Letters Patent, is:

l. I claim giving the arbor B1, simul-l taneously with its reciprocatingrotary motion, a longitudinal movement back and forth, by means of thecollar (r), placed on the shaft G, and provided with the spiral groove(g), and inclined or oblique end (s), and the bar I-I, which is placedloosely on the shaft G, and connectedv with said collar as described.

2.'I claim the employment or useof the spring (e), placed within thesleeve (d), and the spring (n1) placed on the shaft N, and connectedwith the arms (g1), (g1), for the purpose of allowing the arbor B1, andarms (g1), (g1), an independent movement and thereby preventing anyinjury which might otherwise be produced by any irregularity in thefeeding of the blanks within the tap boX.

ALMGN B. GLOVER.

Witnesses: v

JOSEPH P. CANFIELD, SIDNEY A. DowNEs.

